Lens board

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A lens board is an accessory for mounting lenses on large format cameras or floor cameras in photography .

purpose

Large format lenses are not designed for use on a specific camera. The mostly two-part lenses are built into the lens boards - suitable for the respective camera type - by screwing the board between the front and rear members of the lens. The camera shutter is usually positioned and mounted in front of the circuit board if it is a central shutter . Some camera manufacturers (e.g. Sinar ) mount the shutter behind the lens. In older models, the shutter was permanently installed in front of or behind the lens board; some cameras did without it entirely.

Types

Almost every manufacturer has their own lens boards. The circuit boards from Plaubel do not fit into the cameras from Sinar and those from Graflex do not fit into the cameras from Linhof . The latter even has different designs depending on the type of camera and the recording format . There are versions in wood, plastic or metal. Modern lens boards are mostly made of aluminum. Some versions have precision adjustment screws for focusing wide-angle lenses or are supplied in special sizes especially for adaptation to wide -angle setting devices .

Drilling

Depending on the lock used, the boards are offered with different, partly standardized, holes. The most common holes are:

  • Compur # 00 - 26.3 mm
  • Compur # 0 - 34.6 mm
  • Compur # 1 - 41.6 mm
  • Compur # 2 - 52.5 mm (there are different versions such as Compur II or Compur II 5/2)
  • Compur # 3 - 65.0 mm
  • Compound Dagor - 38.0 mm
  • Compound # 3 sleeve 7 - 63.2 mm
  • Compound # 4 sleeve 9 - 69.1 mm
  • Compound # 4 sleeve 10 - 80.0 mm
  • Compound # 5 sleeve 12 - 93.4 mm

Since most of the central locks are now manufactured by Nidec Copal Corporation , Copal numbers are often referred to:

  • Copal # 0 - 34.6 mm
  • Copal # 1 - 41.6 mm
  • Copal # 3 - 65.0 mm
  • Copal # 3s - 64.5mm

See also

literature

  • Hermann Brix: Large Format Photography, Tools and Experiences , Lindemanns, 2003.
  • Jim Stone: A User's Guide to the View Camera , Prentice Hall, 1997.